369360
Given \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), the work done during combustion of \(\mathrm{0.090 \mathrm{~kg}}\) of ethane (molar mass \(\mathrm{=30}\) ) at \(\mathrm{300 \mathrm{~K}}\) is
369361
An ideal gas is allowed to expand against a constant pressure of 2 bar from \(\mathrm{10 \mathrm{~L}}\) to \(\mathrm{50 \mathrm{~L}}\) in one step. Calculate the amount of work done by the gas. (Given that \(\mathrm{1 \mathrm{~L}}\) bar \(\mathrm{=100 \mathrm{~J}}\) )
1 \(\mathrm{-10 \mathrm{~kJ}}\)
2 \(\mathrm{-10 \mathrm{~J}}\)
3 \(\mathrm{-8 \mathrm{~J}}\)
4 \(\mathrm{-8 \mathrm{~kJ}}\)
Explanation:
\(\rm{w=-p_{e x}\left(V_{f}-V_{i}\right)=-2 \times 40=-80 \mathrm{~L} \text { bar }=-8 \mathrm{~kJ}}\) The negative sign shows that work is done by the system on the surrounding.
CHXI06:THERMODYNAMICS
369362
A gas is allowed to expand against a constant external pressure of 2.5 bar from an initial volume ' \(\mathrm{x}\) ' \(\mathrm{L}\) to final volume of \(4.5 \mathrm{~L}\). If amount of work done is \(5 \mathrm{dm}^{3}\) bar, what is the value of ' \(\mathrm{x}\) '?
369363
A gas absorbs \(\mathrm{250 \mathrm{~J}}\) of heat and expands from 1 litre to 10 litre at constant temperature against external pressure of \(\mathrm{0.5 \mathrm{~atm}}\). The values of \(\mathrm{\mathrm{w}}\) and \(\mathrm{\Delta \mathrm{U}}\) will be, respectively.
369360
Given \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), the work done during combustion of \(\mathrm{0.090 \mathrm{~kg}}\) of ethane (molar mass \(\mathrm{=30}\) ) at \(\mathrm{300 \mathrm{~K}}\) is
369361
An ideal gas is allowed to expand against a constant pressure of 2 bar from \(\mathrm{10 \mathrm{~L}}\) to \(\mathrm{50 \mathrm{~L}}\) in one step. Calculate the amount of work done by the gas. (Given that \(\mathrm{1 \mathrm{~L}}\) bar \(\mathrm{=100 \mathrm{~J}}\) )
1 \(\mathrm{-10 \mathrm{~kJ}}\)
2 \(\mathrm{-10 \mathrm{~J}}\)
3 \(\mathrm{-8 \mathrm{~J}}\)
4 \(\mathrm{-8 \mathrm{~kJ}}\)
Explanation:
\(\rm{w=-p_{e x}\left(V_{f}-V_{i}\right)=-2 \times 40=-80 \mathrm{~L} \text { bar }=-8 \mathrm{~kJ}}\) The negative sign shows that work is done by the system on the surrounding.
CHXI06:THERMODYNAMICS
369362
A gas is allowed to expand against a constant external pressure of 2.5 bar from an initial volume ' \(\mathrm{x}\) ' \(\mathrm{L}\) to final volume of \(4.5 \mathrm{~L}\). If amount of work done is \(5 \mathrm{dm}^{3}\) bar, what is the value of ' \(\mathrm{x}\) '?
369363
A gas absorbs \(\mathrm{250 \mathrm{~J}}\) of heat and expands from 1 litre to 10 litre at constant temperature against external pressure of \(\mathrm{0.5 \mathrm{~atm}}\). The values of \(\mathrm{\mathrm{w}}\) and \(\mathrm{\Delta \mathrm{U}}\) will be, respectively.
369360
Given \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), the work done during combustion of \(\mathrm{0.090 \mathrm{~kg}}\) of ethane (molar mass \(\mathrm{=30}\) ) at \(\mathrm{300 \mathrm{~K}}\) is
369361
An ideal gas is allowed to expand against a constant pressure of 2 bar from \(\mathrm{10 \mathrm{~L}}\) to \(\mathrm{50 \mathrm{~L}}\) in one step. Calculate the amount of work done by the gas. (Given that \(\mathrm{1 \mathrm{~L}}\) bar \(\mathrm{=100 \mathrm{~J}}\) )
1 \(\mathrm{-10 \mathrm{~kJ}}\)
2 \(\mathrm{-10 \mathrm{~J}}\)
3 \(\mathrm{-8 \mathrm{~J}}\)
4 \(\mathrm{-8 \mathrm{~kJ}}\)
Explanation:
\(\rm{w=-p_{e x}\left(V_{f}-V_{i}\right)=-2 \times 40=-80 \mathrm{~L} \text { bar }=-8 \mathrm{~kJ}}\) The negative sign shows that work is done by the system on the surrounding.
CHXI06:THERMODYNAMICS
369362
A gas is allowed to expand against a constant external pressure of 2.5 bar from an initial volume ' \(\mathrm{x}\) ' \(\mathrm{L}\) to final volume of \(4.5 \mathrm{~L}\). If amount of work done is \(5 \mathrm{dm}^{3}\) bar, what is the value of ' \(\mathrm{x}\) '?
369363
A gas absorbs \(\mathrm{250 \mathrm{~J}}\) of heat and expands from 1 litre to 10 litre at constant temperature against external pressure of \(\mathrm{0.5 \mathrm{~atm}}\). The values of \(\mathrm{\mathrm{w}}\) and \(\mathrm{\Delta \mathrm{U}}\) will be, respectively.
369360
Given \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), the work done during combustion of \(\mathrm{0.090 \mathrm{~kg}}\) of ethane (molar mass \(\mathrm{=30}\) ) at \(\mathrm{300 \mathrm{~K}}\) is
369361
An ideal gas is allowed to expand against a constant pressure of 2 bar from \(\mathrm{10 \mathrm{~L}}\) to \(\mathrm{50 \mathrm{~L}}\) in one step. Calculate the amount of work done by the gas. (Given that \(\mathrm{1 \mathrm{~L}}\) bar \(\mathrm{=100 \mathrm{~J}}\) )
1 \(\mathrm{-10 \mathrm{~kJ}}\)
2 \(\mathrm{-10 \mathrm{~J}}\)
3 \(\mathrm{-8 \mathrm{~J}}\)
4 \(\mathrm{-8 \mathrm{~kJ}}\)
Explanation:
\(\rm{w=-p_{e x}\left(V_{f}-V_{i}\right)=-2 \times 40=-80 \mathrm{~L} \text { bar }=-8 \mathrm{~kJ}}\) The negative sign shows that work is done by the system on the surrounding.
CHXI06:THERMODYNAMICS
369362
A gas is allowed to expand against a constant external pressure of 2.5 bar from an initial volume ' \(\mathrm{x}\) ' \(\mathrm{L}\) to final volume of \(4.5 \mathrm{~L}\). If amount of work done is \(5 \mathrm{dm}^{3}\) bar, what is the value of ' \(\mathrm{x}\) '?
369363
A gas absorbs \(\mathrm{250 \mathrm{~J}}\) of heat and expands from 1 litre to 10 litre at constant temperature against external pressure of \(\mathrm{0.5 \mathrm{~atm}}\). The values of \(\mathrm{\mathrm{w}}\) and \(\mathrm{\Delta \mathrm{U}}\) will be, respectively.
